51718705000 has 40 divisors (see below), whose sum is σ = 121176937530. Its totient is φ = 20687480000.

The previous prime is 51718704991. The next prime is 51718705001. The reversal of 51718705000 is 50781715.

It can be written as a sum of positive squares in 5 ways, for example, as 554979364 + 51163725636 = 23558^2 + 226194^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51718705001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5166871 + ... + 5176870.

Almost surely, 2^51718705000 is an apocalyptic number.

51718705000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51718705000 is an abundant number, since it is smaller than the sum of its proper divisors (69458232530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51718705000 is a wasteful number, since it uses less digits than its factorization.

51718705000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343767 (or 10343748 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 51718705000 in words is "fifty-one billion, seven hundred eighteen million, seven hundred five thousand".